Tonga earthquakes

M4.1 earthquake 251 km W of Houma, Tonga

A magnitude 4.1 earthquake struck 251 km W of Houma, Tonga on Fri, Oct 20, 2023, 1:42 AM GMT+13 (12:42 UTC), 479 km (297 mi) below the surface.

A larger quake followed: M4.9 284 km WNW of Houma, Tonga. This one was a foreshock.

Nuku‘alofa forecastMore in Tonga

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.1 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-10-19 12:42:38 UTC
Depth
478.6 km (297.4 mi), deep
Epicenter
20.770° S, 177.682° W
Region
Tonga
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 15.1 km horizontally, 12.1 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
79°
Stations used
27

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 4.0Fiji region · 1075 days ago · 595 km deep · 91 km away
  2. 4.3Fiji region · 1074 days ago · 533 km deep · 58 km away
  3. 4.7272 km WNW of Houma, Tonga · 1073 days ago · 518 km deep · 31 km away
  4. 4.1Fiji region · 1070 days ago · 536 km deep · 81 km away
  5. 4.1266 km WNW of Houma, Tonga · 1064 days ago · 501 km deep · 28 km away
  6. 4.4272 km WNW of Houma, Tonga · 1063 days ago · 378 km deep · 30 km away
  7. 4.3256 km WNW of Houma, Tonga · 1060 days ago · 502 km deep · 18 km away
  8. 4.0285 km WNW of Houma, Tonga · 1058 days ago · 496 km deep · 67 km away
  9. 4.4Fiji region · 1058 days ago · 597 km deep · 96 km away
  10. 4.8Fiji region · 1055 days ago · 561 km deep · 72 km away
  11. 4.4Fiji region · 1051 days ago · 594 km deep · 97 km away
  12. 4.2269 km WNW of Houma, Tonga · 1047 days ago · 499 km deep · 49 km away
  13. 4.1274 km WNW of Houma, Tonga · 1046 days ago · 526 km deep · 51 km away
  14. 4.1269 km WNW of Houma, Tonga · 1044 days ago · 493 km deep · 76 km away
  15. 4.2260 km W of Houma, Tonga · 1043 days ago · 409 km deep · 60 km away
  16. 4.1278 km WNW of Houma, Tonga · 1042 days ago · 460 km deep · 37 km away
  17. 4.0264 km WNW of Houma, Tonga · 1041 days ago · 457 km deep · 32 km away
  18. 4.6Fiji region · 1039 days ago · 544 km deep · 74 km away
  19. 4.3277 km WNW of Houma, Tonga · 1037 days ago · 548 km deep · 46 km away
  20. 4.4258 km WNW of Houma, Tonga · 1036 days ago · 508 km deep · 82 km away
  21. 4.9284 km WNW of Houma, Tonga · 1035 days ago · 533 km deep · 47 km away
  22. 4.2278 km WNW of Houma, Tonga · 1034 days ago · 553 km deep · 34 km away
  23. 4.5Fiji region · 1033 days ago · 536 km deep · 78 km away
  24. 4.1274 km WNW of Houma, Tonga · 1032 days ago · 497 km deep · 55 km away
  25. 4.3240 km WNW of Houma, Tonga · 1031 days ago · 508 km deep · 44 km away
  26. 4.4Fiji region · 1031 days ago · 538 km deep · 66 km away
  27. 4.4266 km WNW of Houma, Tonga · 1031 days ago · 369 km deep · 86 km away
  28. 4.3259 km WNW of Houma, Tonga · 1024 days ago · 498 km deep · 57 km away
  29. 4.3Fiji region · 1024 days ago · 573 km deep · 98 km away
  30. 4.2264 km W of Houma, Tonga · 1024 days ago · 456 km deep · 23 km away
  31. 4.2284 km WNW of Houma, Tonga · 1022 days ago · 496 km deep · 89 km away
  32. 4.4Fiji region · 1021 days ago · 536 km deep · 71 km away
  33. 4.2271 km WNW of Houma, Tonga · 1021 days ago · 583 km deep · 27 km away

Before

  1. 4.3256 km WNW of Houma, Tonga · 1086 days ago · 541 km deep · 79 km away
  2. 4.7261 km WNW of Houma, Tonga · 1089 days ago · 500 km deep · 60 km away
  3. 4.2297 km WNW of Houma, Tonga · 1091 days ago · 564 km deep · 58 km away
  4. 4.7250 km WNW of Houma, Tonga · 1094 days ago · 503 km deep · 28 km away
  5. 4.3273 km WNW of Houma, Tonga · 1097 days ago · 507 km deep · 55 km away
  6. 4.3298 km W of Houma, Tonga · 1097 days ago · 380 km deep · 89 km away
  7. 4.3297 km W of Houma, Tonga · 1099 days ago · 623 km deep · 47 km away
  8. 4.5257 km WNW of Houma, Tonga · 1104 days ago · 527 km deep · 84 km away
  9. 4.5Fiji region · 1108 days ago · 542 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000l601. Read Fri, Oct 2, 2026, 9:17 AM UTC.